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Cornerstone · Grades 3–5 Keystones #1 19 November 2010 Skills week 1 of 7
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Five GCSE retrieval questions · 19 November 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 3⁄5 + 1⁄7

    Answer: 26⁄35
  2. 2. Algebra Two-step equations

    Solve: 2x + 3 = 17

    Answer: x = 7
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 9cm and 12cm

    Answer: 15cm
  4. 4. Ratio Sharing in a ratio

    Share 36 in the ratio 3:1

    Answer: 27 and 9
  5. 5. Statistics Mean

    Calculate the mean of: 43, 50, 35, 24, 36, 9. Give your answer to 2 decimal places

    Answer: 32.83

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